From Pathfinder Lost Omens Hellfire Dispatches, which isn't enabled.

Hidden Intentions

FEAT 10

Prerequisites Twilight Talon Dedication; master in Deception

You layer meanings in your words, and only those you've taken into your confidence can divine your true plans. You gain the Doublespeak and Slippery Secrets skill feats. On the first round of combat, if you roll Deception for initiative, creatures that haven't acted are Off-Guard to you.

Pathfinder Lost Omens Hellfire DispatchesORC